Purpose: Teachers can use this tool as an informal assessment to gain immediate feedback about what their students know, how many students know, and on which topics the subsequent lessons/activities should be focused. This strategy can be used prior to, during, or after teaching a unit or lesson. It could be used as review anytime throughout the school year as well.

Preparation: a class set of key rings clipped with GREEN-YELLOW-MAGENTA-ORANGE-PURPLE squares (not included)